We hope to see you at HMChO 2027!
The 2nd Annual HMChO was held held virtually on February 21, 2026.
Join our mailing list to be notified of future opportunities!
HMChO 2026 Award Ceremony (7 PM EST, Sunday 3/1/26): https://www.youtube.com/@HMChO.official
Exam and Solutions now posted on Past HMChOs tab. Graded exams returned on Gradescope. Congratulations to the students!
Founded by past USNCO winners and IChO medalists from Harvard and MIT, HMChO was created with the vision of inspiring high school students worldwide to deepen their passion for chemistry. Our goals:
Engage a diverse community of students;
Support students in reaching beyond school curriculums;
Prepare students for examinations like the U.S. National Chemistry Olympiad (USNCO) by presenting questions written by USNCO study campers and IChO medalists;
Provide students with an enriching environment with peers across the world.
The Olympiad follows a format modeled after the U.S. National Chemistry Olympiad (USNCO) National Exam (Parts I and II) in order to ensure a rigorous assessment of students across the multiple areas of chemistry. It will run virtually in the 2026 competition.
The exam will be split into two parts as follows with a break between them:
Part I: 90 minutes for 60 multiple-choice questions;
Part II: 105 minutes for 8 written-response problems;
Scoring Formula: Total Score = 1.25 × Part I Score + Part II Score.
Please see the FAQs page for more detailed syllabus/scoring information and how to best prepare!
HMChO is open to all high school students (equivalents of U.S. grades 9-12) with all students participating in the same division.
HMChO has an international scope and invites students from all countries to participate.
Tournament Date: Saturday, February 21st, 2026
Updated per email to students
Check-in Time: 9:30 AM EST. Students must be present at this time, but are strongly encouraged to arrive 20 minutes early (9:10 AM) for check in to ensure check in is complete in a timely fashion.
When checking in to the Zoom, ensure your workspace is clear and completely in view of camera (per regulations), your calculator is allowed, and your Zoom name is your full name (e.g. Luke Chen).
Part I Exam (Multiple Choice): 10:40 AM - 12:10 PM EST
Break: 12:10 PM - 12:40 PM EST
Part II Exam (Free Response): 12:40 PM - 2:25 PM EST
Part II Exam Upload Period: 2:25 PM - 2:40 PM EST
Harvard-MIT Student Panel: Sunday, February 22nd, 2026; 10 AM EST. In this optional event, competitors will have the opportunity to ask questions to HMChO staff members regarding studying STEM, experiences at university, and advice for admissions to Harvard and MIT.
Awards Ceremony: Sunday, March 1st, 2026; 7 PM EST. https://www.youtube.com/@HMChO.official.